INPC07, Yukawa Session, June 3, 2007 Interplay between Yukawa and Tomonaga in the Birth of Meson...
-
Upload
rose-booth -
Category
Documents
-
view
219 -
download
0
Transcript of INPC07, Yukawa Session, June 3, 2007 Interplay between Yukawa and Tomonaga in the Birth of Meson...
INPC07, Yukawa Session, June 3, 2007
Interplay between Yukawa and Tomonaga
in the Birth of Meson
Toshimitsu Yamazaki, Nishina Memorial Foundation
BIRTH OF MESON Early history 1930’s
H. Yukawa1949 N. L.
S. Tomonaga 1965 N. L.
Interaction
Interplay
Y. Nishina (RIKEN)Father of Modern ScienceOne of the discoverers of the muon in 1937
QuickTime˛ Ç∆TIFFÅiLZWÅj êLí£ÉvÉçÉOÉâÉÄ
ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅB
QuickTime˛ Ç∆TIFFÅiLZWÅj êLí£ÉvÉçÉOÉâÉÄ
ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅB
J (r) = A exp(- r) / r
= mU c / h
Yukawa potential
force range parameter
mass of mediating particle U
For instance,
1935
1932 Discovery of the neutron (Chadwick)1932 Heisenberg theory of nuclear structure1933 spring meeting of JPMS (Sendai) both: 26 years old Yukawa (Kyoto --> Osaka): On the problem of nuclear electrons Nishina suggested a boson Bose electron? Tomonaga (RIKEN): On the proton-neutron interaction using
J (r) = A exp(- r) / r nothing but Yukawa’s interaction !!!
Interplay between Yukawa and TomonagaLetter from Tomonaga to Yukawa ~1933
Yukawa Archive at Yukawa Institute for Fundamental Physics, Kyoto
QuickTime˛ Ç∆TIFFÅià≥èkǻǵÅj êLí£ÉvÉçÉOÉâÉÄ
ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅB
QuickTime˛ Ç∆TIFFÅià≥èkǻǵÅj êLí£ÉvÉçÉOÉâÉÄ
ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅB
QuickTime˛ Ç∆TIFFÅià≥èkǻǵÅj êLí£ÉvÉçÉOÉâÉÄ
ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅB
In fact, on the “back of the envelo
pe” Yukawa wrote down the electron Compton wavelength ~ 3 x 1010 cm-1 !!
QuickTime˛ Ç∆TIFFÅià≥èkǻǵÅj êLí£ÉvÉçÉOÉâÉÄ
ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅBElectron Compton wavelength ?
e = 260 !!, which would mean mU / me = 260
QuickTime˛ Ç∆TIFFÅià≥èkǻǵÅj êLí£ÉvÉçÉOÉâÉÄ
ǙDZÇÃÉsÉNÉ`ÉÉÇ å©ÇÈÇΩÇflÇ…ÇÕïKóvÇ≈Ç∑ÅB
Tomonaga used the form J(r) = A exp(-r)/r to account for the deuteron binding energy and p (n,) d reaction; yielding 6.5 x 1012 /cm
This letter must have affected Yukawa deeply, but, in the spring of 1933, neither of Yukawa and Tomonaga recognized the importance of the above formula and the implication of .
Tomonaga published in 1936Bethe-Peierls 1935
Tomonaga and Araki 1940 positive and negative meson capture to disentangle the problem of +/- pion/muon
Fermi-Teller-Weisskopf 1947
Yukawa’s acknowledgement to Tomonaga
Yukawa’s 1st paper in 1935
Yukawa’s strugglingin 1933
how can a migrating real particle exist
in nuclei?Bose electron ?force range ? p + e- = n ?
Finally, in 1935, Yukawa arrived at
virtual mediating
particle
a la K. Nishijima
The Yukawa theory A virtual particle mediates strong interaction
mU/me ~ 200 The mesons discovered
Fundamental concept in physics
Heitler-London-Heisenberg scheme: completely abandoned ?
Structure of K-pp Theoretical prediction Y. Akaishi, T.Y.
Proc. Jpn. Acad. Ser. B 83 (200
7) 144
Revival of the Heitler-London-Heisenberg scheme ! Cold Dense Nuclei - Kaon Condensation
Thank you very much